Home / 20,128.45-27,776.42-11,175.42

Finding the Fourth Proportional to 20,128.45, 27,776.42 and 11,175.42

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Solution

The fourth proportional to 20,128.45, 27,776.42 and 11,175.42 is: 15,421.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.45 : 27,776.42 = 11,175.42 : x
  2. Step 2: Convert to fraction form
    20,128.45/27,776.42 = 11,175.42/x
  3. Step 3: Cross multiply
    20,128.45x = 27,776.42 × 11,175.42
  4. Step 4: Simplify right side
    20,128.45x = 310,413,093.55
  5. Step 5: Solve for x
    x = 310,413,093.55/20,128.45
  6. Step 6: Final answer
    x = 15,421.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.